:root {
  --bg: #0a0a0a;
  --bg-raised: #121212;
  --border: #262626;
  --text: #e8e8e8;
  --text-dim: #8a8a8a;
  --accent: #f5a623;
  --accent-dim: #8a5e1a;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-menu {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
}

.nav-menu a:hover { color: var(--accent); }

.nav-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
}

.brand-mark { color: var(--accent); }

.nav-sub {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 13px;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

.label {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 13px;
  margin: 40px 0 8px;
}

.hero h1 {
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.15;
  margin: 0 0 16px;
}

.accent { color: var(--accent); }

.hero-sub {
  color: var(--text-dim);
  max-width: 540px;
  margin-bottom: 28px;
}

.terminal-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-raised);
  margin-bottom: 20px;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-title {
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 13px;
  margin-left: 8px;
}

.terminal-body {
  padding: 16px;
  font-family: var(--mono);
  font-size: 14px;
}

.terminal-body p { margin: 0 0 6px; }
.prompt { color: var(--accent); margin-right: 6px; }
.terminal-out { color: var(--text-dim); padding-left: 16px; }

.search-box {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.search-box input {
  flex: 1;
  min-width: 0;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
}

.search-box input:focus { outline: 1px solid var(--accent); }

.search-box button {
  background: var(--accent);
  color: #1a1200;
  border: none;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 700;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}

.search-box button:active { transform: scale(0.98); }

.result-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 14px;
  background: var(--bg-raised);
}

.result-card h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.result-meta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 4px 0 20px;
  font-size: 16px;
}

.spec-table tr {
  border-bottom: 1px solid var(--border);
}

.spec-table tr:last-child { border-bottom: none; }

.spec-table th, .spec-table td {
  text-align: left;
  padding: 10px 14px 10px 0;
  vertical-align: top;
}

.spec-table th {
  color: var(--text-dim);
  font-weight: 500;
  width: 140px;
  white-space: nowrap;
}

.spec-table td {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 15px;
}

.result-card .section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin: 22px 0 8px;
}

.result-card .stage-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin: 24px 0 10px;
}

.result-card .stage-title:first-child { margin-top: 0; }

.result-card p, .result-card ol, .result-card li {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
}

.result-card ol { padding-left: 22px; }
.result-card li { margin-bottom: 8px; }

.video-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 15px;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  transition: border-color 0.15s, color 0.15s;
}

.video-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.video-icon {
  width: 19px;
  height: 19px;
  color: var(--accent);
  flex-shrink: 0;
}

.ref-heading {
  font-size: 19px;
  color: var(--accent);
  margin: 26px 0 10px;
}

.ref-heading:first-child { margin-top: 0; }

h3.ref-heading { font-size: 16px; color: var(--text); }

.ref-list {
  margin: 0 0 14px;
  padding-left: 22px;
}

.ref-list li {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.warning {
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  color: var(--text-dim);
}

.no-results {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 14px;
}

.corpus-stats {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 14px;
  margin: 0 0 18px;
}

.corpus-stats strong { color: var(--accent); }

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--text-dim);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.filter-chip:hover { color: var(--text); border-color: #3a3a3a; }

.filter-chip.is-active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(245, 166, 35, 0.08);
}

.filter-chip .cat-icon { width: 15px; height: 15px; }

.grid-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-dim);
}

.diff-badge {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  white-space: nowrap;
  /* Guard against an over-long value from a future contributor blowing out
     the card, badges are for glanceable values, not sentences. */
  max-width: 55%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.diff-easy { color: #4ade80; border-color: rgba(74, 222, 128, 0.35); }
.diff-medium { color: var(--accent); border-color: rgba(245, 166, 35, 0.35); }
.diff-hard { color: #f87171; border-color: rgba(248, 113, 113, 0.35); }
.diff-ref { color: var(--text-dim); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 40px;
}

.grid-card {
  background: var(--bg-raised);
  padding: 18px;
  cursor: pointer;
  display: block;
  color: inherit;
  text-decoration: none;
}

.grid-card:hover { background: #181818; }

.grid-card h4 {
  margin: 0 0 4px;
  font-size: 16px;
}

.grid-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
}

.cat-icon {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.icon-engine { animation: spin 6s linear infinite; transform-origin: center; }
.icon-brakes { animation: pulse 2s ease-in-out infinite; transform-origin: center; }
.icon-electrical { animation: flicker 2.5s ease-in-out infinite; }
.icon-cooling { animation: bob 2.5s ease-in-out infinite; }
.icon-maintenance { animation: swing 2s ease-in-out infinite; transform-origin: 70% 70%; }
.icon-suspension { animation: compress 1.6s ease-in-out infinite; transform-origin: center; }
.icon-steering { animation: steer 3s ease-in-out infinite; transform-origin: center; }
.icon-transmission { animation: shift 2.4s ease-in-out infinite; }

@keyframes shift {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(2px); }
}

@keyframes compress {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.82); }
}
@keyframes steer {
  0%, 100% { transform: rotate(-18deg); }
  50% { transform: rotate(18deg); }
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.1); }
}
@keyframes flicker {
  0%, 44%, 100% { opacity: 1; }
  48% { opacity: 0.35; }
  52% { opacity: 1; }
  80% { opacity: 0.7; }
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
@keyframes swing {
  0%, 100% { transform: rotate(-10deg); }
  50% { transform: rotate(10deg); }
}

.spec-icon {
  width: 15px;
  height: 15px;
  color: var(--accent);
  flex-shrink: 0;
  vertical-align: -3px;
  margin-right: 6px;
}

.icon-torque { animation: spin 5s linear infinite; transform-origin: center; }
.icon-parts { animation: bob 2.2s ease-in-out infinite; }
.icon-tools { animation: swing 1.8s ease-in-out infinite; transform-origin: 70% 70%; }
.icon-time { animation: spin 8s linear infinite; transform-origin: center; }
.icon-difficulty { animation: pulse 1.8s ease-in-out infinite; transform-origin: center; }

@media (prefers-reduced-motion: reduce) {
  .cat-icon, .spec-icon { animation: none !important; }
}

.card-icon-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.procedure-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 20px;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(circle at 20% 20%, rgba(245, 166, 35, 0.08), transparent 60%);
}

.procedure-banner .cat-icon {
  width: 48px;
  height: 48px;
}

.procedure-banner .cat-label {
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 13px;
}

.back-link {
  display: inline-block;
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 13px;
  margin: 24px 0 0;
}

.back-link:hover { color: var(--accent); }

.ask-section h2 {
  font-size: 26px;
  margin: 0 0 10px;
}

#ai-answer { margin-bottom: 20px; }

#ai-btn:disabled {
  opacity: 0.6;
  cursor: progress;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px 60px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--mono);
}